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Title: Formation of Stable Interphase of Polymer-in-Salt Electrolyte in All-Solid-State Lithium Batteries

Abstract

The integration of solid-polymer electrolytes into all-solid-state lithium batteries is highly desirable to overcome the limitations of current battery configurations that have a low energy density and severe safety concerns. Polyacrylonitrile is an appealing matrix for solid-polymer electrolytes; however, the practical utilization of such polymer electrolytes in all-solid-state cells is impeded by inferior ionic conductivity and instability against a lithium-metal anode. In this work, we show that a polymer-in-salt electrolyte based on polyacrylonitrile with a lithium salt as the major component exhibits a wide electrochemically stable window, a high ionic conductivity, and an increased lithium-ion transference number. The growth of dendrites from the lithium-metal anode was suppressed effectively by the polymer-in-salt electrolyte to increase the safety features of the batteries. In addition, we found that a stable interphase was formed between the lithium-metal anode and the polymer-in-salt electrolyte to restrain the uncontrolled parasitic reactions, and we demonstrated an all-solid-state battery configuration with a LiFePO 4 cathode and the polymer-in-salt electrolyte, which exhibited a superior cycling stability and rate capability.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Texas Materials Institute, The University of Texas at Austin, Austin Texas 78712, USA
Publication Date:
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1909277
Grant/Contract Number:  
SC0005397
Resource Type:
Published Article
Journal Name:
Energy Material Advances
Additional Journal Information:
Journal Name: Energy Material Advances Journal Volume: 2021; Journal ID: ISSN 2692-7640
Publisher:
American Association for the Advancement of Science (AAAS)
Country of Publication:
United States
Language:
English

Citation Formats

Gao, Hongcai, Grundish, Nicholas S., Zhao, Yongjie, Zhou, Aijun, and Goodenough, John B. Formation of Stable Interphase of Polymer-in-Salt Electrolyte in All-Solid-State Lithium Batteries. United States: N. p., 2021. Web. doi:10.34133/2021/1932952.
Gao, Hongcai, Grundish, Nicholas S., Zhao, Yongjie, Zhou, Aijun, & Goodenough, John B. Formation of Stable Interphase of Polymer-in-Salt Electrolyte in All-Solid-State Lithium Batteries. United States. https://doi.org/10.34133/2021/1932952
Gao, Hongcai, Grundish, Nicholas S., Zhao, Yongjie, Zhou, Aijun, and Goodenough, John B. Thu . "Formation of Stable Interphase of Polymer-in-Salt Electrolyte in All-Solid-State Lithium Batteries". United States. https://doi.org/10.34133/2021/1932952.
@article{osti_1909277,
title = {Formation of Stable Interphase of Polymer-in-Salt Electrolyte in All-Solid-State Lithium Batteries},
author = {Gao, Hongcai and Grundish, Nicholas S. and Zhao, Yongjie and Zhou, Aijun and Goodenough, John B.},
abstractNote = {The integration of solid-polymer electrolytes into all-solid-state lithium batteries is highly desirable to overcome the limitations of current battery configurations that have a low energy density and severe safety concerns. Polyacrylonitrile is an appealing matrix for solid-polymer electrolytes; however, the practical utilization of such polymer electrolytes in all-solid-state cells is impeded by inferior ionic conductivity and instability against a lithium-metal anode. In this work, we show that a polymer-in-salt electrolyte based on polyacrylonitrile with a lithium salt as the major component exhibits a wide electrochemically stable window, a high ionic conductivity, and an increased lithium-ion transference number. The growth of dendrites from the lithium-metal anode was suppressed effectively by the polymer-in-salt electrolyte to increase the safety features of the batteries. In addition, we found that a stable interphase was formed between the lithium-metal anode and the polymer-in-salt electrolyte to restrain the uncontrolled parasitic reactions, and we demonstrated an all-solid-state battery configuration with a LiFePO 4 cathode and the polymer-in-salt electrolyte, which exhibited a superior cycling stability and rate capability.},
doi = {10.34133/2021/1932952},
journal = {Energy Material Advances},
number = ,
volume = 2021,
place = {United States},
year = {Thu Jan 07 00:00:00 EST 2021},
month = {Thu Jan 07 00:00:00 EST 2021}
}

Journal Article:
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https://doi.org/10.34133/2021/1932952

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